Abstract: According to the layout of synchrotron facility and beamline,a new method is proposed to evaluate the control network precision,which is based on the reference points' the straightness and deviation.An experiment model is constructed to simulate the transfer station measurement process of beamline control network.Close-loop measuring can reduce the deviation effectively.While transferring a beamline control network at SSRF,deviation of control network was accurately judged by reference points' deviation.

Key words: deviation of reference point, straightness, beamline control network, transfer station measurement